251 questions with Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V tags

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How to hide the topbar in Hyper-V client in full screen?

This thing here is in the way

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2025-07-03T09:30:39.1433333+00:00
Johannes Kingma 611 Reputation points
commented 2026-09-16T16:46:59.93+00:00
JuliaMarvin 22,530 Reputation points Volunteer Moderator
2 answers One of the answers was accepted by the question author.

Hyper-V Saved-State VM Migration Fails Due to Missing Encryption Keys

Hi all, We are migrating several Hyper-V virtual machines that were left in a Saved State to a new Hyper-V host. The VM configuration and saved-state files were copied successfully, but the new host cannot resume the VMs because it does not have the…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-09-12T01:29:32.3433333+00:00
John Wilson 40 Reputation points
accepted 2026-09-15T07:23:02.59+00:00
John Wilson 40 Reputation points
2 answers One of the answers was accepted by the question author.

Orphaned checkpoint on a VM with no "delete" option

Hi everyone, Hope you are all doing well~~ I got into an issue with one of the VM in Hyper-V. There were 6 Orphaned checkpoint created unexpectedly (not manually created for sure). I think those were caused by the backup system (__bric) and now backup…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-09-02T19:47:05.0966667+00:00
Takami Chiro 311 Reputation points
commented 2026-09-08T15:04:55.9566667+00:00
Takami Chiro 311 Reputation points
18 answers One of the answers was accepted by the question author.

Problem booting Windows 2012R2 VM on Windows 2025 Hyper-V

We're having a problem with a Windows Server 2025 Hyper-V cluster. We have 2 identical clusters (same hardware, same BIOS version) and when we move a Windows 2012R2 VM from one cluster to another it does not boot any more (tested with 2 different…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2025-07-20T05:33:22.69+00:00
Stefan Cuypers 100 Reputation points
edited a comment 2026-08-28T13:44:23.43+00:00
Fernando J. Pineda B 0 Reputation points
2 answers

ReFS Volume Directory Structure Corruption (Event ID 133)

Hyper-V hosts are repeatedly logging ReFS Event ID 133 (File System Check), indicating corrupted metadata allocations on a critical VM backup volume. What is the correct procedure for running ⁠refsutil salvage⁠ to extract uncorrupted VM images from a…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-24T13:26:29.7533333+00:00
Samuel Parker 40 Reputation points
answered 2026-08-24T14:20:49.58+00:00
Harry Phan 31,780 Reputation points Independent Advisor
2 answers

Hyper-V CSV Read Cache Eating All RAM & Crashing Hosts—How to Cap BlockCacheSize?

High-read workloads are blowing out our Hyper-V cluster's CSV Read Cache and starving the hosts of RAM, causing node crashes. What's the best way to cap BlockCacheSize via PowerShell to stop these OOM errors?

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-20T09:21:47.1133333+00:00
Advait Mohammad 40 Reputation points
answered 2026-08-21T05:16:35.5666667+00:00
Harry Phan 31,780 Reputation points Independent Advisor
2 answers

How should a CSV be recovered after a temporary cluster network failure?

After a brief network flap on one Hyper-V cluster node, one of our Cluster Shared Volumes remained in a Paused state and reported error 0xc000020c. Cluster networking has already recovered, but the affected CSV did not return to normal access…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-18T06:35:04.94+00:00
Jiya Raha 100 Reputation points
answered 2026-08-21T00:41:07.3133333+00:00
Harry Phan 31,780 Reputation points Independent Advisor
2 answers

When will Debian 13 be officially supported by Microsoft as a guest OS on on Hyper-V?

We are looking to upgrade our Debian Servers running as VM's on our Server 2025 Hyper-V Virtualization platform but the documentation suggests only Version 10,11 and 12 are…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-19T09:16:20.4533333+00:00
Redfern, Paul 0 Reputation points
commented 2026-08-19T12:07:55.7066667+00:00
Redfern, Paul 0 Reputation points
1 answer

Hyper-V Live Migration 0x80072746 (CPU Generation Mismatch) — Bulk enabling Processor Compatibility via PowerShell?

Quick hardware mismatch headache: Live Migrations in our cluster keep crashing with Error 0x80072746 because some hosts are on different CPU generations. I know turning on Processor Compatibility Mode fixes the CPU feature set mismatch, but what’s the…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-12T04:35:46.4933333+00:00
S Kumar 30 Reputation points
answered 2026-08-12T21:18:28.7566667+00:00
Allan Solomon Mejia 8,585 Reputation points
2 answers

My Hyper-V guest VM is stuck in an Unmapped state

I'm having real problems with a guest VM on our Hyper-V cluster. It has entered an Unmapped state because the .VMCX configuration file remains locked by an orphaned vmwp.exe process from a previous cluster node. And I can't work out how to release the…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-07T16:59:37.8366667+00:00
Michael Johnson 60 Reputation points
answered 2026-08-11T06:58:55.4+00:00
Daphne Huynh (WICLOUD CORPORATION) 1,385 Reputation points Microsoft External Staff Moderator
1 answer

ReFS kernel dump truncation (12%) on Hyper-V CSV failure – How to configure DedicatedDumpFile to a raw/local disk tier

1. Environment: OS: Windows Server 2022 Datacenter (Hyper-V Cluster) Storage: ReFS on Cluster Shared Volumes (CSV) 2. Issue Summary: During an unhandled ReFS metadata exception on a Hyper-V host node, the system fails to write a complete kernel dump…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-04T15:07:39.54+00:00
Zephyr Vance 20 Reputation points
edited an answer 2026-08-05T03:02:54.38+00:00
Daphne Huynh (WICLOUD CORPORATION) 1,385 Reputation points Microsoft External Staff Moderator
1 answer

Docker build hangs only on one Hyper-V host

Details I am troubleshooting a Docker build issue in a corporate environment. All hostnames, IP addresses, repository names, and other identifying information have been anonymized for security reasons. Environment Impacted Host: Dedicated Windows…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-08-03T18:07:18.6333333+00:00
Mahesh Apine 0 Reputation points
commented 2026-08-04T05:11:08.14+00:00
Mahesh Apine 0 Reputation points
1 answer

Gen 2 VM stuck at boot post-Live Migration — Secure Boot template mismatch

Guys, quick check. Live-migrated a Gen 2 VM across nodes in the cluster and it failed to boot up straight after. Looks like the target node Secure Boot template is out of sync with the source node. To prevent this kind of silent failure, how do you all…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-07-31T05:48:33.2366667+00:00
Chang Min 40 Reputation points
answered 2026-08-03T02:05:17.2966667+00:00
Brian Huynh 3,815 Reputation points Microsoft External Staff
1 answer

Hyper-V Remote Access Fails After CredSSP Patch

How can I restore remote Hyper-V Manager access without weakening the CredSSP security fix?

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-07-31T07:02:05.52+00:00
Jie Jun 60 Reputation points
answered 2026-07-31T18:22:52.8566667+00:00
Allan Solomon Mejia 8,585 Reputation points
1 answer

Live migration Failed between cluster

Hi every One Can any one give me solution for this i am getting migration fail in quick and live migration , getting error below Live migration of 'Virtual Machine DC1' failed. Virtual machine migration operation for 'DC1' failed at migration…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-07-18T13:55:16.8366667+00:00
Tanzeel ur Rahman 0 Reputation points
edited a comment 2026-07-21T08:10:49.0866667+00:00
Tanzeel ur Rahman 0 Reputation points
3 answers

Unique system parameters even in case of VM clone

Hello, I am looking for some unique parameters with which I can identify the virtual machine uniquely. Even if VMs are clonned (by any type of option available), I should get the different values for different VMs i.e. original and clone should have…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-06-12T06:40:12.6166667+00:00
edited a comment 2026-07-15T08:21:46.72+00:00
1 answer

Hyper-v v-NIC has span traffic issue.

I have a HPE Proliant DL360 gen11 with a pair of HYPER-V failover cluster and external iscsi storage. On the Hyper-v host The server running window server 2022 standard. I have created hyper-v v-switch. The solution is span traffic from cisco…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-07-14T01:54:50.8833333+00:00
Songchai P 0 Reputation points
answered 2026-07-14T02:32:49.8533333+00:00
Domic Vo 33,190 Reputation points Independent Advisor
1 answer

Windows Server 2025 (26100): vmicvss fails to start with Event 7009 connect timeout on multiple guests - production checkpoints and backups broken

Environment: Host: Windows Server 2025 Standard, build 26100, standalone (workgroup) Guests: 2x Windows Server 2025, VM config version 12.0 (one Domain Controller, one File Server) Updates: KB5094137, KB5094125 (June 2026 CUs),…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-07-01T21:28:37.4866667+00:00
Emran Moradian 0 Reputation points
answered 2026-07-02T02:04:14.2633333+00:00
HLBui 12,060 Reputation points Independent Advisor
1 answer

Hyper-V Reference Point / Production Checkpoint failures on Windows Server 2025

Dear Microsoft Support, We are experiencing intermittent Hyper-V Reference Point / Production Checkpoint related failures on a newly deployed Windows Server 2025 Hyper-V host. Environment Host OS: Microsoft Windows Server 2025 Standard OS Build:…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-06-30T08:10:26.8433333+00:00
Koller Zoltán 0 Reputation points
answered 2026-06-30T10:10:33.8466667+00:00
Xuan Nhu 970 Reputation points Independent Advisor
1 answer

Is Oracle Linux 8.9 supported to run as a virtual machine on Windows Server Hyper‑V?

Is it supported to run Oracle Linux 8.9 as a virtual machine on Windows Server Hyper-V? We checked the following documentation, but Oracle Linux 8.9 is not listed there, while Oracle Linux 9.0 is listed. Therefore, we are unsure about the support status…

Windows for business | Windows Server | Storage high availability | Virtualization and Hyper-V
asked 2026-06-30T09:29:10.9566667+00:00
Akira Ishikawa 0 Reputation points
answered 2026-06-30T09:32:47.3633333+00:00
Quinnie Quoc 11,840 Reputation points Independent Advisor